Breast flap clamping machine



DBC. 5, W, N BRAY ET AL n BREAST FLAP CLAMPING MACHINE Dec- 5, 1939 w. N. BRAY ET AL 2,182,01

y BREAST FLAP CLAMPING MACHINE Filed July 26, 1938 asheetS-sheet 2 W ,/N VEA/T0515 FAM@ Dec. 5, 1939U l w. N. BRAY ET A1. 2,182,011

BREAST FLAP CLAMPING MACHINE Filed July 26, 1938 5 Sheets-Sheet 3 Dec. 5, 1939w w. N. BRAY ET AL ZJSZME BREAST FLAP CLAMPING MACHINE Filed July 26, 1938 5 Sheets-Sheet 4 Dec. 5, 1939.

w. N. .BRAY z-:T Al. 2,182,011

BREAST FLAP CLAMPING MACHINE Filed July 26, 1958 5 Sheets-Sheet 5 Patented Dec., 5, 1939 UNITED STATES Liann PATENT orne BREAST FLAP CLADIPING MACHINE Application July 26, 1938, Serial No. 221,375 In Great Britain August 6, 1937 16 Ciaims.

This invention relates to the manufacture of shoes and is herein illustrated as embodied in a machine for clamping covering iiaps against the breasts of attached heels of shoes.

In the manufacture of shoes it is common practice, after applying a covering flap to the breast of the attached heel of the shoe by the use of glue or other adhesive, to clamp a rubber pad against the heel breast in order to hold the flap in place until the glue has dried. Machines comprising one or more units each having a replaceable rubber pad such as above referred to have been proposed. The rubber pads should be of suitable shape to conform readily under pressure to the breast of the heel, it being customary for one pad to accommodate shoes having heels of slightly different sizes and styles.

In order that the rubber pad may be eectively used in connection with shoes having heels of a wide range of sizes and styles, and in accordance with a feature of this invention, the illustrated machine comprises a support for a shoe, a resilient pad, mechanism for moving the pad height- Wise of the shoe against the breast of an attached heel of the shoe to press a laid-up iiap against the heel breast, mechanism responsive to heightwise pressure of the pad against the heel breast for moving the pad lengthwise of the shoe against the heel breast, and means for varying the degree of lengthwise thrust of the pad against the heel breast with relationto the heightwise thrust of the pad against theheel breast in accordance with the shape of the heel of the shoe.

The illustrated machine is provided-with a pair of rubber pads which are moved into engagement with the breast and the rear face, respectively, of the heel of the shoe upon the support, from positions remote from theshoe. The pads are forced into engagement with the heel by treadle-operated mechanism or by power-operated means and are locked in their clamped positions against the heel by a latch until the iiap attaching adhesive has dried. If desirable, a plurality of single clamping units may be mounted upon a turret which is rotated step by step and is provided with power-operated means for successively forcing the pads of the different units with additionall showing the illustrated machine with a shoe clamped therein;

Fig. 2 is a side elevation, partly in section and partly broken away, of the upper portion of the machine after the shoe has been removed; 5

Fig. 3 is a detail View showing in side elevation a pair of heel clamping pads and mechanism for operating the same;

Fig. 4 is a view showing the mechanism of Fig. 3 as viewed in the direction of arrow IV of Fig. 3;

Fig. 5 is a section on line V-V of Fig. 2;

Fig. 6 shows in perspective the carrier for the pad which clamps the flap against the breast of the heel;

Figs. 7 and 8 are side views of mechanism for operating a latch through which the pads are held in clamped relation with the heel;

Fig. 9 is a vertical section of a portion of a turret machine upon which a plurality of clamping units, such as illustrated in Figs. 1 to 8, inclusive, have been mounted;

Fig. l0 is a side view showing in detail a cam of the turret machine through which presser arms of the different units are successively operated; and

Fig. 11 is a detail View showing a cam of the turret machine for limiting rearward movement of the pad carrier mechanism of the different units.

The illustrated machine is described with reference to clamping covering flaps 29 (Fig. 1), which have been laid upon the breasts of heels 22 of shoes 24 by the use of an adhesive, such for eX- ample as hot glue, against the breasts of the heels until the glue has dried.

The machine comprises a forwardly extending bracket 26 (Figs. 1 and 2) secured by screws 28 to a pedestal 30 (Fig. l) Adjustably mounted upon the bracket 26 is a support 32 (Figs. 1, 2, and 5) for the shoe comprising a last pin 34 formed integrally with a yoke 36 engaged by the cone of a last 38 (Fig. l) upon which the shoe 24 is mounted. The yoke 36 is pivoted on a pin 49 (Figs. 1, 2 and 5) secured to a block 42 which may be moved into different adjusted positions along a flange 44 of the bracket 26. The yoke 36 may be tipped to a slight degree on the pin 49, forward and rearward tipping movement, respectively, of the yoke being limited by a stop face 46 (Fig. 2) on the block 42 and a screw 48 (Figs. l and 2) threaded into the block. The block 42 may be secured in different adjusted positions on the bracket 26 by a thumb screw 59 (Figs. 2 and 5) which is threaded into the block. As shown in Fig. 5J the yoke 36 is movable to a slight eX- tent along the pin 40. By tipping and sliding the yoke 36, as above described, upon the block 42, and adjusting the block along the flange 44 of the bracket 26, the operator is enabled to position the shoe to the best advantage relatively to clamping pads 52, 54 which will be described later.

The toe portion of the shoe 24 (Fig. 1) mounted upon the support 32 engages a rubber covered rod 56 (Figs. 1 and 2) secured to the forward" end of a exible metal strip 58 secured by screws (not shown) to a slide 60 movable in a horizontal guideway of a post 62. The post 62 is provided with a recess for receiving a spring-pressed plunger 64 (Fig. 2) arranged to engage one of three recesses 66 on the under side of the slide 60 (Figs. 1 and 2) to hold the same in a predetermined position in the guideway, in accordance with the size of the shoe. By yieldingly mounting the toe supporting rod 56 as above described, the toe of the shoe may be tipped downward against the action of the metal stripv 58 when the operator is positioning the shoe. The post 62 is slidingly mounted in a-pedestal 6l forming part of the bracket 26. Pivoted on the pedestal 6l is a spring-pressed pawl 68 which engages one of a plurality of ratchet teeth 10 (Fig. 2) on the post 62 and normally prevents downward movement of the post in the pedestal 6l. The post may be conveniently raised or lowered to its' desired operating position by the operator.

In order to clamp the covering Iiap 26 (Fig. l) against the breast of the heel 22 and usually against the rear end of the shank portion of the sole of the shoe, the heel is provided with the clamping pads 52, 54v (Figs. l, 2, 3, 4 and 6) which are preferably made of rubber or other resilient material and are arranged to engage the rear face and the covered breast of the heel respectively. The pads 52, 54 when in engagement with the heel extend laterally across the same, the face of the pad 52 which engages therear face of the heel being of suitable size and shape to accommodate a wide variety of heels. The pad 52 may be readily detached from the machine and preferably three pads having differently shaped operative surfaces are provided so that a pad suitable for use in -connection .with any particular heel may be readily positioned in the machine.

The pad 52 is held in a holder 72 by-pins 13 threaded into the sides of the holder and fitting in recesses in the pad. The holder 12 has projecting from its opposite sides a pair of coaxial rods 14 and 'I6 (Fig. 4) which are rotatably mounted in the lower ends of a pair of bellcrank-levers 'E8 (Figs. 1 to 4). the right side of the holder, as viewed in Fig. 4,

has its projecting portion covered with a rubber sleeve 15 (Figs. 3 and 4) so that the operator may the left side of the holder has a projecting portion carrying a handhold 80 (Figs. 2, 3 and 4) through the provision of which the pad 52 may be rotated by the operator in positioning the pad against the rear face of-the heel. In order to prevent idle rotating movement vof the pad 52 a friction washer 82 (Fig. 4) is provided between the handhold 80 and the lower end of the corresponding bell-crank-lever 18. Rotation of the handhold 80 in opposite directions is limited by faces 86 (Fig. 3) of the handhold with a pin 88 projecting from the adjacent bell-crank-lever 18.

The rod 'F4 atv The pad 54 which is forced against the ap 20 (Fig. 1) after its application to the breast of the heel by the operator, is secured in a holder 90 (Figs. 1 to 4 and 6) by pins 22 (Figs. 3 and 6) threaded into the sides of the holder and tted into recesses of the pad. The pad holder 90 is provided with a recess 94 (Figs. 3 and 6) for receiving a bar 96 having forwardly bent ends 98 which lie against opposite sides of the holder and have secured to them coaxial rods |00 (Figs. 3 and 6) and |02 (Fig. 6) rotatably mounted in the lower ends of a pair of bell-crank-levers |04. By pulling downward on the pad holder 90, the

' pad 54 may be removed from the machine and another pad of a diierent shape and size in a similarly shaped holder may be secured in the machine by engaging the recess 94 of the holder with the bar 96 and pressing the holder upward.

The rod |00 (Fig. 6) at the right side, as viewed by the operator extends beyond the adjacent arm of the bell-crank-lever |04 in which it is mounted and has on it a rubber sleeve |06 (Figs. 3 and 6) which is also gripped by the right hand of the operator when he grips the sleeve 'l5 (Figs. 3 and 4) mounted upon the rod 14. The rod |02 eX- tends beyond the arm of the bell-crank-lever |04 in which it is mounted and has secured to it a curved handhold |08 (Figs. 3, 4 and 6) corresponding to but larger than the handhold 80 (Figs. 3 and 4). A friction-washer (not shown) is provided between the handhold .|68 and the adjacent bell-crank-lever |04 and a stop pin ||0 (Fig. 3) carried by the bell-crank-lever is engaged by faces ||2 of the handhold to limit rotation of 1 are engaged by the right and left hands, respectively, of the operator preparatory to moving the pads 52, 54 into engagement with the heel of the shoe mounted upon the shoe support 32 (Figs. 1 and 2).

When the pads 52, 54 have been brought down` ward and forward to embrace the heel they are moved toward each other and are rotated by the action of the operators hands on the rubbercovered rods T4, |00 and the handhelds 80, |08, as will-,appear later, to insure that the pads shall engage and it snugly against the rear ends and the flap-covered breasts of heels of the different shoes successively mounted upon the shoe support 32.

The bell-crank-levers 18, |04 at opposite sides of the pads 52, 54, respectively, are pivoted o n a rod I4 (Figs. 1 to 4) which is carried by bifurcations ||6 of a pad supporting lever or carrier ||8 and is parallel to the rods 14, |00 of the respective pad holders 52, 54. The upper ends of the bell-crank-levers 18, |04 at each side of the pads are pivoted through rods |20 (Figs. 1, 2, 3 and 4) and |22 (Figs. 1, 2 and 3), respectively, to the lower ends' of a pair of toggle links or arms |24, |26 (Figs. 1 to 4) which extend upward toward each other and at their upper ends are pivoted by a rod |28 to a beam |30. The links |24, |26 may be described as constituting a toggle the knuckle of which is pivoted to the beam |30 by the rod |28 and the ends of which are pivoted to the respective bell-crank-levers l0, |04. Pivoted to the beam |30 by a rod |32 is a link |34 the lower portion of which is pivoted to the bifurcated portion H6 of the carrier H3 by a rod |36.

The arrangement is such that when the pads 52, 54 are pressed against the heel of a shoe upon the support 32 and the beam |30 is moved downward, the pads are pressed bodily downward and are moved toward each other about the rod H4. Secured to the rods |25', |22 are the opposite ends of a tensionv spring |38v which tends normally to draw the rods together and thus to hold the pads 52, 54 apart. When the pads 52, 54 are in their respective inoperative positions shown in Fig. 2 in which they are located well above and rearward of the heel they are to engagathe tension spring |38 is expanded and the pads are separated sufficiently tor enable them to pass freely in front of and behind the heel of the shoe upon the support 32 when they are moveddownward by the operator into position against the work.

In positioning the pads 52, 54 against the work the operator grasps the sleeves 75, |55 with his right hand and the handholds Sli, |28 with his left hand and moves the pads downward and forward toward each other until the pad 54 engages the covered breast of the heel and the rear end of the shank portion of the sole, and the pad 52 engages the rear face of the heel. In positioning the pads 52, 54 against the heel the operator usually rocks the pads slightly through the handholds 85, heel. During the movement of the pads 52, 54

toward each other the rod |22 connecting thek toggle links |24 and |25 to each other moves downward toward the' rod ||4 and the rods |22,

|22 move away from each other, and as the beam is moved further downward through mechanism, which will be described later, to press the pads downward and toward each other against the heel, the rods |20, |22 move further away from each other. The result of the movements of the rods i 25, |22 away from .each other is that a greater proportion of pressure is applied lengthwise of the shoe against the heel than is applied in a downward direction as the pads 52, 54 approach more closely to each other. This result is particularly advantageous in operating upon shoes having high Louis heels the upper portions of the breasts of which are sharply convexed laterally, since it insures that the part of the breastV iiap near the tread end of the heel shall be forced against the breast of the heel with adequate pressure and also insures that the flap shall be eiiectively clamped against the lateral margins of the projecting portion of the heel breast.

Mounted for sliding movement on the beam is a block |40 (Figs. 1 to 4) adjustable forward and rearward through the provision` of a screw |42 which is rotatably mounted in the rear end of the beam and is threaded into a depending boss |44 (Fig. 4) of the b-lock. As will appear later, by moving the block |55 into dierent operative positions along the beam |30, the proportion of lengthwise and heightwise pressures exerted by the pads against the work may be varied in accordance with the shape of the heel of the shoe. The block |42 has pivotally connected to it by pins |45 (Figs. 1 to 4) the upper ends of a pair of beam supporting links |48 (Figs. 1, 2 and 3) extending downward and forward The lower ends of the beam supporting links |43 (Figs. 1 and 2) are pivoted through pins |55 to arms of a bifurcated pad actuating lever |52. The lever |52 is pivoted on a horizontal bearing pin |54 secured in the bracket 25, the arms of they lever converging at their lower ends into a-single shank portion. A ratchet block |56 is secured to the lower end of the pad actuating lever |52, the block being curved concentrically with respect to the aXis of the bearing pin |54 and being provided with-ratchet teeth |58.

|08 to cause them snugly to t thek The carrier I 8 is pivoted at its rear end upon a pin |60 mounted at the upper end of a guiding lever |52 which is pivoted on a bearing pin |64 secured to the shoe supporting bracket 26. In order normally to urge the carrier and the parts mounted thereon upward to a position in which the pads 52, 54 are located well above and rearward o f the shoe support 32, there is provided a spring which is coiled around the pin |62 and is of suicient strength to overcome the weight of the carrier ||8 and the parts mounted thereon. The carrier guiding lever |52 carries a roll |88 which is normally held in engagement with a stop il@ by a spring |12. With the above arrangement, when the machine is idle the pads 52, 54 are raised and moved rearward to the position shown in Fig. 2 so that the shoe on the last may be readily placed in the shoe and the breast iiap may be conveniently pressed against the breast of the heel by the. operator. During the downward movement of the pads 52, 54 toward the shoe the beam |35 swings about its pivotal .connections tothe beam supporting links |48 which swing about their pivotal connectionsto the pad actuating lever |52. Also, during'the downward movement of the pads 52, 54, the carrier i8 swings downward about the pin |56 which is swung forward with the carrier guiding lever |62 about the bearing pin |54.

When the pads 52, 54 are beingpressed against the shoe by treadle-operated mechanism, which will be described later, the ratchet teeth .|58 of the block |55 are engaged by a pawl il!! which, while the pads are moved by the operator into engagement with the heel, is held away from the ratchet teeth. The pawl |74 is pivoted upon the horizontal pin |15 secured in a presser arm |12 which is pivoted on the bearing pin |54 and is arranged to be swung upward to cause, through the pawl |714, the pads 52, 54 to be pressed against the shoe.. A spring-pressed plunger |82 in the presser arm |18 constantly urges the pawl |14 forward toward the ratchet teeth |52. When the presser arm is in its lowered position (Figs. l and 2) it engages a stop face |32 (Fig. 2) on the shoe supporting bracket 25 and the pawl |714l is held away from the ratchet teeth l|58 by a pin 215i' on the bracket which engages an arm |86 of the pawl;v The shoe supporting bracket 25 has rotatably mounted on it a roll |23 which is engaged by the forward face of the ratchet block |54 during the upward movement of the same. The rear end of the presser arm |13 is raised by a rod |22 operated by a treadle |92 (Fig. 1) which is normally held in a raised position by a spring As the pads 52, 54 are moved downward by the operator into engagement with the heel the ratchet block |56 springs upward past but does not engage the pawl |14. When the pads 52, 54 have been positioned against the heel, the presser arm |18 is raised, the pawl |14 being moved by the plunger |85 into engagement with one of the ratchet teeth |52. Further upward movement of the presser arm |28 operated through the treadle rod |92 to the position shown in dotted lines in Fig. l causes the pads to be forced with considerable pressure against the heel. If desirable, the treadle rod |95 of the machine may be mechanically operated.

By moving the block |40 into diierent adjusted positions along the beam |30 it is possible to vary the proportionl of inward pressure of squeezeof the pads 52, 54 against the heel with relation to the downward' pressure of the pads vagainst the heel.' The pads'52, 54 'are moved bodily downward about the pin |60 at the lower end of the carrier ||8, which pin is located rearward of the rods ||4 and is eifected by a downward pull of the beam supporting links |48. Assuming therefore, that the pull on the beam supporting links |48 is constant, forward adjustment of the block on the beam |30 increases owing to increased leverage or downward pressure of the pads against the work, and rearward adjustment of the block |40 on the beam decreases said leverage. The inward pressure of the pads 52, 54 is obtained by moving the beam downwardly about its forward end which is connected by the link |34 to the forward end of the carrier H8. If the block |40 is moved near to the pivo-t rod |28, the inward pressure of the pads 52, 54 against the shoe, assuming a constant pull on the beam supporting links |88 is maintained, is by the change in leverage decreased, and if the block |40 is moved into a rearward adjusted position on the beam |30, the inward pressure of the pads is increased. Accordingly, forward adjustment of the block |40 on the beam |88 increases the downward pressure and decreases the inward pressure of the pads against the heel and vice versa. By varying the amount of inward pressure the pressure of the pad against the heel may be quickly varied by the operator in accordance with the shape of the breast of any heel.

The operator releases the treadle |92 as soon as the heel has been securely clamped by the pads 52, 54, the clamping pressure of the pads against the heel being maintained until the glue has dried, through the provision of latching mechanism which is best shown in Figs. 7 and 8, and comprises a pawl |96 (Figs. 1, 2, '7 and 8) for engaging and holding the ratchet teeth |58 and holding the lever |52 and the pads in their raised clamped positions against the heel. The locking pawl |96 is pivoted at the forward end of a pawl carrying arm |98 (Figs. 7 and 8) by a pin200 (Figs. 1, '7 and 8). extends downward and rearward and is pivoted at its rear end on a bearing pin 202 (Figs. 1, 2, 3 and 4) secured to a bracket 204 xed to the main frame. The pawl |96 is normally forced against the ratchet teeth |58 by a spring-pressed plunger 206 (Figs. 7 and 8) carried by the arm |98. Pivoted upon the pin 280 on which the pawl |96 is mounted is an upper toggle link 208 the lower end of which is pivoted to a lower toggle link 2|0. The lower end of the toggle link 2|0 is keyed toa shaft 2| 2 mounted in the bracket 204. The shaft 2 I2 to which the lower toggle link 2 0 is secured has fixed on it a rearwardly extending arm 2|4 (Figs. 1, '7 and 8) to which is connected a spring 2|6 extending upward and having its upper end connected to a pin 2|8 secured to the bracket 204. The spring 2|6 tends to hold the toggle links 208, 2|0 in their straightened positions shown in Fig. 7 and therefore in cooperation with the spring-pressed plunger 296 to hold the pawl |96 in engagement with the ratchet teeth |58.

In order to release the pads 52, 58 preparatory to removing the shoe from the machine after the flap attaching adhesive has dried, there is provided a hand lever 220 (Figs. 1 and 2) connected by a rod 222 (Figs. 1, 2, '7 and 8) to an arm 224 pivoted upon the shaft 2|2 to which the toggle link 2|@ is secured. A flange 226 (Figs. 1, '7 and rangement being such that when the hand lever The pawl carrying arm |98y The gradual relieving of the pressure of the pads 52, 54 against the heel prevents shock and noise which wouldotherwise occur were the pawl |96 suddenly withdrawn from the ratchet teeth |58 while the pads 52, 55 are pressed against the heel. When the pawl has been lowered far enough entirely to relieve or substantially relieve the pressure of the pads 52, 51| against the heel, a cam. face 260 (Figs. '7 and 8)v on the pawl |96 engages a cam roll 232 carried by the bracket 264. 'IheA pawl |96 during its continued downward movement is moved away from the ratchet teeth |58 by the cam roll 232. After the operator releases the hand lever 220 it drops to its lower position and the toggle is again straightened out under the action of the spring 2|6 to force the pawl |96 against the ratchet teeth |58, as best shown in Fig. 7.

If desirable, a plurality of heel clamping units, for example twelve, such as above described, may he mounted upon a turret 234 (Figs. 9 and 10) which is secured to a rotatable drive sleeve 236 (Fig. 9) mounted upon bearings (not shown) supported by the frame of the machine. The work-supporting bracket 26 of each of the units may be secured to the turret by screws 238 (Figs. 9 and 10), and the presser arm |18 may be raised by a cam 249 which is mounted uponball bearings 282 (Fig. 9) secured to a cylindrical casing 244. Threaded into the upper end of the cylindrical casing 244 is a screw 246. A thick rod 248 is ment it will vbe clear that when the sleeve 250 is moved upward the screw 246 is also forced up ward with yielding pressure through the spring 254 and carries with it the cylindrical casing 244 and the cam 240.

Mounted in the lower part of the machinev frame is mechanism for indexing the turret 234 step by step about an axis`i256 and for raising and lowering the sleeve 250. In accordance with the preferred practice, afterl the operator has positioned the pads 52, 59 of one ofthe units in the loading position (Fig. 9) against the heel by hand as above described, the sleeve 250 is raised manually through suitable mechanism by depressing a treadle (not shown) to force the pads securely against the heel. Upon continued depression of the treadle, a clutch (not shown) is tripped, the arrangement being such that after the clutch has been tripped the turret is indexed through ,-12- of a revolution and the sleeve 250, during such indexing movement, is moved upward under mechanical pressure to force the'pads 52, 54 with additional pressure against the heel.

When the unit in which the shoe is to be positioned is in the loading station (Fig. 9), the

coi'

presser arm |18 is positioned` above a face 258 of the cam 246. Since the arm |18 is forced upward by the cam 246 during the indexing of the turret through the first lg of a revolution, it is desirable that the cam 266 swing with the turret to the first indexed position. Accordingly, the cam 266, when forced against the operating arm |18, rotates with the arm to the first indexed position, and when the sleeve 256 is lowered, causing through the above-described mechanism the cam 246 to be moved to its lowered inoperative position, the cam swings back to its original position under the action of a spring 266 (Fig. 10) the retractive movement of the cam under the action of the spring being limited by a depending tongue 262 which extends downward from the cylindrical casing 2114 into a recess 2611 of the cam.

The turret is also pro-vided with a cam 266 (Fig. l1) which corresponds to the stop |16 of the single unit and is engaged during the rotation of the turret 284 by the rollers `|68 of the respective units when there are no shoes in'said units. The cam 266 is provided with a cylindrical face 268 which is concentric with the axis 256, and a recess 216 arranged at the loading station for allowing the pads 52, 511 of the unit located at said station to be moved well back from the shoe support 82 so as to provide ample space for the operator to lay the breast flap against the heel and to beat it into position by a hand tool. If the shoe supports leave the loading position without shoes on them and these pads are therefore in their raised positions shown in Fig. 2, the cylindrical surface 263 of the cam 266 moves'the pads somewhat forward, that is, away fromthe axis 256 of rotation of the turret 234, and prevents the units from fouling each other. If the clamping units are all loaded and the pads 52, 56 are clamped against theheels of the shoes in the respective units, the rollers |68 will be out of engagement with the cam 266.

Each of the units of the turret machine is provided with a locking pawl 212 which is similar to the above-described pawl |96 and is automatically operated to release the work just before the unit arrives at the loading station. Since the parts of the above-described locking unit are substantially identical with corresponding parts of the unit disclosed in Figs. 7 and 8, the above-described parts have been given, respectively, the same numerals each followed by the letter a.. The pawl 212 is normally held out of engagement with the teeth |58 of the ratchet block |56 against the action of the spring-pressed plunger 26a by a latch 214 having at its upper end a hook 216 arranged to engage a shoulder 218 on the pawl 212. As soon as the shoe support begins to move toward the loading station, the inner end of the latch 214 engages beneath a cam 280 secured by screws 282 to the main frame of the machine. The cam 28|] causes the hook 216 on the latch 214 to be raised from engagement with the pawl 212 to allow the pawl to be moved by the springpressed plunger 2660, into engagement with the ratchet teeth |58, any movement of the ratchet block |56 when the power squeeze is applied causing the ratchet teeth to slip past the pawl. The latch 214 is pivoted at 284 to the rear end vof one arm of a bell-crank-lever 286 whichis pivoted on the pin 266a. The bell-crank-lever 286 has a downwardly and forwardly extending arm which has'formed in it a slot 288 extending along said arm, the slot engaging a pin 290 extending vfromthebracket-20M. The pivot conneoting the upper and lower toggle linksv 268e,

2|0a, has pivoted on it the forward end of ay link `292 which at its, rear end is pivoted to one arm of a bellcrank-lever ,266 pivoted on a horizontal shaft 266 secured to'the bracket 264e. Theother arm of the bell-crank-lever 264 has a cam roll298 which is arranged to engage a cam groove 366 of a cam 362 secured to the frame of the machine as the unit moves from its eleventh indexed position to the loading station. When the shoe support and the clamping mechanism of one of the units is about to leave the eleventh station around the machine, the toggle is straightened and the toggle 212 is holding the pads 52, 56 pressed against the heel. As the unit is moving from its eleventh indexed position toy downward while the pawl 212 is still in engagelowered far enough to substantially relieve the pressure of the pads 52, 54 against the heel, the cam face 23641. of the pawl engages the cam roll 2.1260 carried by the bracket, moving the pawl rearward away from the ratchet teeth |58. Duringthis movement the Yhook 216 at the forward end of the ratchet 2113, which has been moved downward by the pawl 212, engages the shoulder 218 on the pawl and holds the same in its rearward position away from the ratchet teeth |58. Just before the unit arrives at the loading station, the cam roll 296 on the bell-crank-lever 294 leaves the cam 366 and the spring 2|6a which tends to hold the toggle links 26611` 211m in a straightened position, straightens the links and raises the pawl, as illustrated in Fig. 9, in readiness for it to be moved into engagement with the ratchet teeth |58 when the unit again leaves the loading station. By providing the latch 214 the pawl 212 is not moved into engagement with the ratchet teeth |58 until the block |56 has been swung to approximately its raised position.

Having described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

l. A machine for clamping' a covering iiap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a resilient pad, mechanism for moving the pad heightwise of the shoe against the breast of the attached heel of the shoe to clamp the ap against the heel breast, mechanism responsive to heightwise pressure of the pad against the heel breast for moving the pad lengthwise of the shoe against the heel breast, and-means for varying the degree of lengthwise thrust of the pad against the heel breast with relation to the heightwise thrust of the pad 'against the heel breast in accordance with the shape of the heel of the shoe.

2. A machine for clamping a covering ap against the breast of an attached heel of a shoe having, in combination, aV support for the shoe,

and the rear face of the heel, said means also being constructed and varranged to move the pads toward each other to exert pressure against the heel in directions lengthwise of the heel, and means for varying the degree of lengthwise pressure of the pads against the heel with relation to the heightwise pressure of the pads against the heel in accordance with the shape of theheel of the shoe.

3. Al machine for clamping a covering flap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a pair of pads, means for moving the pads heightwise of the heel to exert a thrust against the breast and the rear face of the heel, means for moving the pads toward each other when they are moved heightwise against the heel to exert a thrust lengthwise of the heel against the breast and the rear face of the heel, and means for varying the thrust of the pads lengthwise against the heel with relation to the thrust of the pads heightwise against the heel in accordance with the shape of the heel of the shoe.

' 4. A machine for clamping a covering iiap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a pair of rubber pads, a spring for normally urging the pads away from each other, and means for moving the pads heightwise of the heel to exert a thrust against the breast and the rear face of the heel, said means comprising a toggle through which the pads are moved toward each other against the action of the spring when the pads are moved heightwise against the heel thereby exerting a thrust lengthwise against the breast and the rear face of the heel.

5. A machine for clamping a covering iyiap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a carrier, levers pivoted to said carrier, heelengaging pads mounted upon the respective levers, a togle the knuckle of which is pivoted to the carrier and the opposite ends of which are pivoted to the respective levers, and means operating through the toggle constructed and arranged to move the pads as a unit against the breast and the rear face respectively of the heel of the shoe and then to swing the pads toward each other with relation to the carrier as pressure is exerted by the pads against the shoe.

6. A vmachine for clamping a covering flap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a carrier, a beam, a link for pivotally connecting the beam to the carrier, bell-crank-levers pivoted to the carrier, heel-engaging pads pivoted to the respective bell-crank-levers, a toggle the knuckle of which is pivoted to the beam and the ends of which are pivoted to the respective bell-cranklevers, said beam being movable about spaced pivots to enable the operator to move the respective pads against the breast and the rear face of the heel of the shoe from an inoperative position remote from the heel, and operating means connected to the beam constructed and arranged rst to move the carrier about one of said pivots for forcing the pads against the breast and the rear face respectively of the heel and then to swing the bell-crank-levers with relation to the carrier thereby moving the pads toward each other to press the heel between them.

7. A machine for clamping a covering flap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a carrier, bell-crank-levers pivoted to the carrier, heel-engaging pads pivoted to the respective bellcrank-levers, abeam, a link operatively connecting the beam to the carrier, a toggle which is normally broken andcomprises links the adjacent ends of which are pivoted to the beam and the other ends of which are pivoted to the respective bell-crank-levers, said carrier being movable aboutv spaced pivots to enable the operator to move the padsfinto engagement with the breast and the rear face respectively of the heel of the shoe from their inoperative positions remote lfrom the shoe, and an operating member connected to the beam for forcing the pads as a unit through the broken toggle against the heel and for closing the toggle when the pads have been forced against the heel thereby swinging the padSmto- Ward each other. Y

8. A machine for clamping a covering ilap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a pair of resilient pads, means constructed and arranged to move the pads heightwise of the shoe to press the-,respective pads against the breast and rear face of the. heel, means responsive to the heightwise pressure of the pads against the heel for forcing the pads toward each other to exert pressure against the heel in directions lengthwise of the heel, and means for varying the ydegree of lengthwise pressure `of the pads against the heel with relation to the heightwise pressure of the pads against the heel in accordance with the shape of the heel of the shoe.

9. A machine for clamping a covering vap against the breast of an attached heel of a shoe having, in combination, a support for `the shoe, a carrier, pairs of levers pivoted to the carrier, heel-engaging pads supported by the respective pairs of levers, a beam, link connections between the carrier'and the beam, one or more toggles connecting the leversto the-Y beam, a springfor normally urging the pads away from each other,

and an operating link pivoted to the beam forv moving the pads toward the shoe upper and for moving the pads toward each other against the action of the spring.

10. Amachine for clamping a covering ap against the breast of an attached heel of a shoe having, in combination. a support for the shoe, a carrier, lpairs of bell-crank-levers pivoted to the carrier, pads pivoted to ythe respective pairswof levers, a beam, link connections between rthe beam and the carrier, one or more pairs of toggles operatively connecting the levers to the beam, a spring for normally urging the pads away from each other, said carrier being freely movableto enable the operator to move theV pads` into engagement with the breast and the rear face respectively of the heel ofthe shoe from their inoperative positions remote from the shoe, and means Vfor operating the beam to move the pads which are in engagement with the heel toward the upper of the shoe as a unit and also to move the pads toward each other.

11. A machine for clamping a covering flap` against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a pair of pads mounted and arranged to be moved by the operator into engagement with the breast and the rear face respectively of thev heel of the shoe, means for moving the pads in engagement with the heel heightwise of the shoe to force said pads with considerable pressure against the breast and the rear face respectively of the heel,`

means responsive to heightwise pressure of the pads against the shoe for moving the pads toward each other lengthwise of the shoe, and means for varying the degree of lengthwise pressure of the pads against the heel with relation to the degree of heightwise pressure of the pad against the heel in accordance with the shape of the heel of the shoe.

12. A machine for clamping a covering ii'ap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a'carrier, pairs of bell-crank-levers pivoted to the carrier about a common axis, a pair of heelengaging pads pivoted to corresponding pairs of levers, a beam, a link connection between the carrier and thel beam, one or more toggles connecting the levers to the beam, a spring for urging the pads away from each other, a guiding lever mounted on a fixed pivot, said carrier being pivoted to the guiding lever to enable the operator to move the pads into engagement with the breast and the rear face respectively of the heel from their inoperative positions remote from the shoe support, means for constantly urging the carrier'and the guiding lever toward their inoperative positions away from the shoe support, a stop for limiting movement of the guiding lever away from the shoe support under the action of said means, and an operating link pivoted to the beam for moving-'the pads in engagement with the heel toward the shoe upper and toward each other.

13. A machine for clamping a covering iiap against the breast of the attached heel of a shoe having, in combination, a support for the shoe, a pair oi pads, means constructed and arranged to enable the operator to move the pads into engagement with the breast and the rear face respectively of the heel of the shoe from their inoperative positions remote from the shoe upon the support, pad-operating mechanism comprising a ratchet which is moved lto a predetermined position when the pads are in engagement with the heel, a presser arm, a pawl carried by the presser arm, a spring for urging the pawl toward the ratchet, a stop, a pin for holding the pawl away from the ratchet against the action of the spring when the presser arm is in engagement with the stop, and means for operating the presser arm to move the same away from the stop thereby permitting the pawl to be moved into engagement with said ratchet under the action of the spring and then causing the pad-operating mechanism to force the pads against the heel.

14. A machine for clamping a covering flap against the breast of an attached heel of a shoe having, in combination, a support for the shoe, a pair of resilient pads, pad-supporting means comprising a carrier, a guiding lever pivoted at one end to the machine frame and at the other end to the carrier to enable the operator to move the respective pads into engagement with the breast and the rear face of the heel of the shoe from their inoperative positions remote from the shoe, springs for normally moving the carrier and the guiding lever away from the shoe support to move the pads to and hold the same in their inoperative positions when the machine is idle, means connected to the carrier for forcing the pads with considerable pressure against the breast and the rear face respectively of the heel, and means for retaining the pads in clamped relation with the heel.

15. A machine for clamping a covering flap against the breast of an attached heel of a shoe having, in combination, a plurality of clamping units, a rotatable turret upon which said vunits are mounted, said turret being mounted for step by step rotation to move the clamping units successively in a closed path to and from a loading station, each of said clamping units comprising a support for a shoe, a pair of resilient pads, mechanism comprising a presser arm constructed and arranged to move the pads heightwise of the shoe against the breast and rear face respectively of the heel of the shoe and to swing the pads toward each other, and a latch for retaining the pads in clamped relation with the shoe, a cam constructed and arranged to operate the presser arms of the successive clamping units in the loading station to cause the pads of the units to be forced against the heels of the shoes in the respective units, and a cam for releasing the latches of the successive units just before they arrived at the loading station.

16. A machine for clamping a covering :Hap against the breast of' an attached heel of a shoe having, in combination, a carrier, pairs of levers pivoted to the carrier, holders pivoted to corresponding pairs of levers, resilient pads secured to the respective holders, friction washers for preventing the holders from turning idly in thev corresponding pairs of levers, and handholds connected to the respective pad holders for rotating the pads into predetermined positions with relation to the respective levers.

WILLIAM NEIL BRAY. FRANK BARTON. 

